JPH1095943A - Aqueous pigment-containing recording liquid - Google Patents
Aqueous pigment-containing recording liquidInfo
- Publication number
- JPH1095943A JPH1095943A JP25106896A JP25106896A JPH1095943A JP H1095943 A JPH1095943 A JP H1095943A JP 25106896 A JP25106896 A JP 25106896A JP 25106896 A JP25106896 A JP 25106896A JP H1095943 A JPH1095943 A JP H1095943A
- Authority
- JP
- Japan
- Prior art keywords
- pigment
- recording liquid
- carbon black
- weight
- recording
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Graft Or Block Polymers (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Polymerisation Methods In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、記録液に関するも
ので、特にインクジェット記録に使用される記録液に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording liquid, and more particularly to a recording liquid used for ink jet recording.
【０００２】[0002]
【従来の技術】インクジェット記録は、低騒音で高速印
字が可能な記録方法であり、最近急速に普及しつつある
記録方法である。このようなインクジェット記録は、記
録液を加熱あるいは加圧といった方法により小液滴とし
て吐出させ、それを紙等の被記録材に付着させて記録を
行うものである。2. Description of the Related Art Ink jet recording is a recording method capable of high-speed printing with low noise, and is a recording method that has been rapidly spreading recently. In such ink jet recording, recording is performed by discharging a recording liquid as small droplets by a method such as heating or pressurization and attaching the recording liquid to a recording material such as paper.
【０００３】記録液の色材としては、これまで、染料が
使用されていた。しかし記録物の耐水・耐候性の面から
考えると、染料よりも顔料を用いる方が有利である。ま
た、液媒体としては、普通紙上への滲みの面から考える
と、非水性液媒体よりも水性液媒体を用いる方が有利で
ある。[0003] Dyes have been used as coloring materials for recording liquids. However, from the viewpoint of water resistance and weather resistance of the recorded matter, it is more advantageous to use a pigment than a dye. As the liquid medium, an aqueous liquid medium is more advantageous than a non-aqueous liquid medium from the viewpoint of bleeding on plain paper.
【０００４】そこで、記録液の色材に顔料を用い、この
顔料を水性液媒体に分散して記録液を作製する試みが成
された（特公平１−１５５４２等）。Therefore, an attempt has been made to prepare a recording liquid by using a pigment as a coloring material of the recording liquid and dispersing the pigment in an aqueous liquid medium (Japanese Patent Publication No. 1-15542).
【０００５】[0005]
【発明が解決しようとする課題】しかし、顔料を水性液
媒体中に分散した記録液は不均一系であるため長期保存
下での顔料の凝集が問題となり、目詰まり等の問題を発
生する。However, since the recording liquid in which the pigment is dispersed in the aqueous liquid medium is a heterogeneous system, aggregation of the pigment during long-term storage becomes a problem, causing problems such as clogging.
【０００６】そこで、本発明の目的は水性液媒体中での
顔料の分散性、その後の長期保存安定性に優れ、さらに
は耐水性、耐候性にも優れた記録液を提供することであ
る。Accordingly, an object of the present invention is to provide a recording liquid which is excellent in the dispersibility of a pigment in an aqueous liquid medium and the long-term storage stability thereafter, and is also excellent in water resistance and weather resistance.
【０００７】[0007]
【課題を解決するための手段】前記課題を解決するため
の本発明の水性顔料系記録液は、顔料としてカーボンブ
ラックを用いる水性顔料系記録液において、前記カーボ
ンブラックが、表面にビニル基を有するモノマーをグラ
フト重合させた表面処理カーボンブラックであることを
特徴としたものである。According to the present invention, there is provided an aqueous pigment-based recording liquid comprising a carbon black as a pigment, wherein the carbon black has a vinyl group on a surface thereof. It is a surface-treated carbon black obtained by graft polymerization of a monomer.
【０００８】また、もう一つの本発明の水性顔料系記録
液は、前記ビニル基を有するモノマーとして、メタクリ
ル酸、メタクリル酸メチル、アクリル酸、アクリル酸メ
チル、アクリロニトリル、アクリルアミド、酢酸ビニ
ル、Ｎ−ビニルピロリドンのうちのいずれか一種もしく
は二種以上を用いたものである。Further, another aqueous pigment-based recording liquid of the present invention comprises, as the monomer having a vinyl group, methacrylic acid, methyl methacrylate, acrylic acid, methyl acrylate, acrylonitrile, acrylamide, vinyl acetate, N-vinyl Any one or more of pyrrolidone is used.
【０００９】本発明に使用するビニル基を有するモノマ
ーには、メタクリル酸、メタクリル酸メチル、アクリル
酸、アクリル酸メチル、アクリロニトリル、アクリルア
ミド、酢酸ビニル、Ｎ−ビニルピロリドン等のビニルモ
ノマーが挙げられる。The monomer having a vinyl group used in the present invention includes vinyl monomers such as methacrylic acid, methyl methacrylate, acrylic acid, methyl acrylate, acrylonitrile, acrylamide, vinyl acetate and N-vinylpyrrolidone.
【００１０】また、これらのビニルモノマーは単独で用
いても良いが、二種以上を同時に使用することもでき
る。These vinyl monomers may be used alone, or two or more of them may be used simultaneously.
【００１１】本発明の水性顔料系記録液は、少なくとも
表面処理カーボンブラック、水性液媒体からなるもので
あるが、必要に応じて各種添加剤等を加えても良い。こ
れらの各種添加剤は、水性顔料系記録液に、必要に応じ
て適宜添加するもので、そのような添加剤としては例え
ば、分散剤、ｐＨ調整剤、表面張力調整剤、酸化防止
剤、紫外線吸収剤、安定剤、防かび剤等が挙げられる。The aqueous pigment-based recording liquid of the present invention comprises at least a surface-treated carbon black and an aqueous liquid medium, but may optionally contain various additives. These various additives are appropriately added to the aqueous pigment-based recording liquid as needed. Examples of such additives include dispersants, pH adjusters, surface tension adjusters, antioxidants, and ultraviolet rays. Examples include an absorbent, a stabilizer, and a fungicide.
【００１２】以上に述べたような組み合わせで水性顔料
系記録液を作製することにより、分散性、保存安定性、
および耐水性、耐候性に優れた記録物を与える水性顔料
系記録液を得ることができる。By preparing an aqueous pigment-based recording liquid in a combination as described above, dispersibility, storage stability,
In addition, an aqueous pigment-based recording liquid that gives a recorded matter having excellent water resistance and weather resistance can be obtained.
【００１３】（作用）顔料の分散性が悪いと、顔料粒子
が記録液中で凝集、沈降してしまう。また、初期の分散
性が良好でも、時間経過により、短時間で分散性が低下
し、顔料粒子が凝集してしまうものは保存安定性が悪
い。(Function) If the dispersibility of the pigment is poor, the pigment particles aggregate and settle in the recording liquid. Even if the initial dispersibility is good, the dispersibility is reduced in a short time with the passage of time, and those in which the pigment particles are aggregated have poor storage stability.
【００１４】記録液の保存安定性を向上させるには、顔
料の水性液媒体中での分散安定性を向上させる必要があ
る。そこで、高分子分散剤を吸着させ、グラフトポリマ
ー立体障害を利用したり、高分子分散剤との相溶性を向
上させ、水性液媒体中での顔料の分散を安定化させる方
法がある。In order to improve the storage stability of the recording liquid, it is necessary to improve the dispersion stability of the pigment in an aqueous liquid medium. Therefore, there is a method in which a polymer dispersant is adsorbed to utilize the steric hindrance of the graft polymer, to improve the compatibility with the polymer dispersant, and to stabilize the dispersion of the pigment in an aqueous liquid medium.
【００１５】本発明では顔料表面に高分子化合物をグラ
フト重合させる事により、水性液媒体中での立体障害に
よる分散安定性、高分子分散剤との相溶性が向上し、長
期保存に耐えうる記録液を得ることができる。In the present invention, by graft polymerizing a high molecular compound on the pigment surface, the dispersion stability due to steric hindrance in an aqueous liquid medium and the compatibility with the high molecular dispersant are improved, and the recording can withstand long-term storage. A liquid can be obtained.
【００１６】[0016]
【発明の実施の形態】前述したように本発明の水性顔料
系記録液は、顔料としてカーボンブラックを用いる水性
顔料系記録液において、前記カーボンブラックが、表面
にビニル基を有するモノマーをグラフト重合させた表面
処理カーボンブラックであることを特徴としたものであ
る。DETAILED DESCRIPTION OF THE INVENTION As described above, the aqueous pigment-based recording liquid of the present invention is obtained by graft-polymerizing a monomer having a vinyl group on the surface of the aqueous pigment-based recording liquid using carbon black as a pigment. Characterized in that it is a surface-treated carbon black.
【００１７】さらに、前記ビニル基を有するモノマーと
しては、メタクリル酸、メタクリル酸メチル、アクリル
酸、アクリル酸メチル、アクリロニトリル、アクリルア
ミド、酢酸ビニル、Ｎ−ビニルピロリドン等のビニルモ
ノマーのうちのいずれか一種もしくは二種以上を用いた
ものである。Further, as the monomer having a vinyl group, any one of vinyl monomers such as methacrylic acid, methyl methacrylate, acrylic acid, methyl acrylate, acrylonitrile, acrylamide, vinyl acetate, N-vinylpyrrolidone and the like can be used. Two or more types are used.
【００１８】[0018]
【実施例】次に、本発明を実施例により更に詳しく説明
する。しかし、下記各実施例が、本発明を限定するもの
ではない。Next, the present invention will be described in more detail with reference to examples. However, the following examples do not limit the present invention.
【００１９】（実施例１）下記配合物を室温で１２時間
撹拌した後に遠心分離機で１０００ｒｐｍ×３０分処理
し、上澄みを除去した後、１１０℃で十分乾燥させ、ビ
ニルシランカップリング剤処理カーボンブラックを得
た。(Example 1) The following formulation was stirred at room temperature for 12 hours, then treated with a centrifuge at 1000 rpm for 30 minutes, and the supernatant was removed. Then, the mixture was sufficiently dried at 110 ° C, and treated with a vinylsilane coupling agent-treated carbon black. I got
【００２０】 カーボンブラック ４０重量％ ビニルトリメトキシシラン １重量％ 純水 ５９重量％Carbon black 40% by weight Vinyl trimethoxysilane 1% by weight Pure water 59% by weight
【００２１】得られたビニルシランカップリング剤処理
カーボンブラックを用い、下記各成分を下記配合比で混
合し、７０℃で３時間撹拌した。粉末をろ過した後に十
分乾燥させ、表面処理カーボンブラックを得た。Using the obtained carbon black treated with a vinyl silane coupling agent, the following components were mixed at the following compounding ratio and stirred at 70 ° C. for 3 hours. After the powder was filtered, it was sufficiently dried to obtain a surface-treated carbon black.
【００２２】 ビニルシランカップリング剤処理カーボンブラック ２０重量％ アゾビスイソブチロニトリル １重量％ 純水 ６９重量％ メタクリル酸 １０重量％Carbon black treated with a vinyl silane coupling agent 20% by weight Azobisisobutyronitrile 1% by weight Pure water 69% by weight Methacrylic acid 10% by weight
【００２３】得られた表面処理カーボンブラックを用
い、下記配合比で超音波処理を行いながらホモジナイザ
ーを用いて１時間予備分散した後に油圧式超高圧ホモジ
ナイザーを用い記録液を作製した。The obtained surface-treated carbon black was preliminarily dispersed for 1 hour using a homogenizer while performing ultrasonic treatment at the following compounding ratio, and then a recording liquid was prepared using a hydraulic ultra-high pressure homogenizer.
【００２４】 表面処理カーボンブラック １重量％ 純水 ８４重量％ グリセリン ５重量％ ポリエチレングリコール １０重量％Surface-treated carbon black 1% by weight Pure water 84% by weight Glycerin 5% by weight Polyethylene glycol 10% by weight
【００２５】（実施例２）実施例１で得られた表面処理
カーボンブラックを用い、下記配合比で超音波処理を行
いながらホモジナイザーを用いて１時間予備分散した後
に油圧式超高圧ホモジナイザーを用い記録液を作製し
た。下記（２０／３５／４５）は共重合体中の各単量体
の重量比を表す。Example 2 The surface-treated carbon black obtained in Example 1 was pre-dispersed for 1 hour using a homogenizer while performing ultrasonic treatment at the following mixing ratio, and then recorded using a hydraulic ultra-high pressure homogenizer. A liquid was prepared. The following (20/35/45) indicates the weight ratio of each monomer in the copolymer.
【００２６】 表面処理カーボンブラック １重量％ 純水 ８３．８７重量％ スチレン−メタクリル酸−メチルメタクリレート共重合体 ０．１重量％ （２０／３５／４５）；分子量約４万 グリセリン ５重量％ ポリエチレングリコール １０重量％ トリエチルアミン ０．０３重量％Surface-treated carbon black 1% by weight Pure water 83.87% by weight Styrene-methacrylic acid-methyl methacrylate copolymer 0.1% by weight (20/35/45); molecular weight about 40,000 glycerin 5% by weight polyethylene glycol 10% by weight Triethylamine 0.03% by weight
【００２７】（比較例１）下記配合比で超音波処理を行
いながらホモジナイザーを用いて１時間予備分散した後
に油圧式超高圧ホモジナイザーを用い記録液を作製し
た。(Comparative Example 1) Pre-dispersion was performed for 1 hour using a homogenizer while performing ultrasonic treatment at the following mixing ratio, and then a recording liquid was prepared using a hydraulic ultra-high pressure homogenizer.
【００２８】 カーボンブラック １重量％ 純水 ８４重量％ グリセリン ５重量％ ポリエチレングリコール １０重量％1% by weight of carbon black 84% by weight of pure water 5% by weight of glycerin 10% by weight of polyethylene glycol
【００２９】（比較例２）下記配合比で超音波処理を行
いながらホモジナイザーを用いて１時間予備分散した後
に油圧式超高圧ホモジナイザーを用い記録液を作製し
た。下記（２０／３５／４５）は共重合体中の各単量体
の重量比を表す。Comparative Example 2 A preparatory dispersion was performed for 1 hour using a homogenizer while performing ultrasonic treatment at the following mixing ratio, and then a recording liquid was prepared using a hydraulic ultra-high pressure homogenizer. The following (20/35/45) indicates the weight ratio of each monomer in the copolymer.
【００３０】 カーボンブラック １重量％ 純水 ８３．８７重量％ スチレン−メタクリル酸−メチルメタクリレート共重合体 ０．１重量％ （２０／３５／４５）；分子量約４万 グリセリン ５重量％ ポリエチレングリコール １０重量％ トリエチルアミン ０．０３重量％Carbon black 1% by weight Pure water 83.87% by weight Styrene-methacrylic acid-methyl methacrylate copolymer 0.1% by weight (20/35/45); molecular weight about 40,000 glycerin 5% by weight polyethylene glycol 10% % Triethylamine 0.03% by weight
【００３１】以上得られた記録液を以下に示す評価方法
で評価を行った。The recording liquid thus obtained was evaluated by the following evaluation method.
【００３２】分散安定性 記録液を室温にて１週間放置した後に顔料の沈降の有無
を調べた。その結果により、下記のように評価した。Dispersion stability After the recording liquid was left at room temperature for one week, the presence or absence of sedimentation of the pigment was examined. The results were evaluated as follows.
【００３３】 沈降無し ○ 沈降あり ×No sedimentation ○ Sedimentation ×
【００３４】上記、実施例１、２および比較例１、２で
作成した記録液において評価を行った結果を下記表１に
示した。各実施例の記録液は良好な分散安定性を示し
た。一方、各比較例の記録液は共に分散安定性が劣って
いた。以上、実施例と比較例の結果より、本発明の記録
液は顔料分散安定性に優れる事がわかる。The evaluation results of the recording liquids prepared in Examples 1 and 2 and Comparative Examples 1 and 2 are shown in Table 1 below. The recording liquids of the examples exhibited good dispersion stability. On the other hand, the recording liquids of Comparative Examples were all inferior in dispersion stability. As described above, the results of Examples and Comparative Examples indicate that the recording liquid of the present invention has excellent pigment dispersion stability.
【００３５】[0035]
【表１】 [Table 1]
【００３６】[0036]
【発明の効果】以上述べたように、本発明の水性顔料系
記録液は顔料分散能が高く、保存安定性に優れる事がわ
かる。As described above, it can be seen that the aqueous pigment-based recording liquid of the present invention has high pigment dispersing ability and excellent storage stability.
【００３７】よって本発明により、色材に顔料を用いる
ことにより耐水性・耐候性に優れ、水性液媒体を用いる
ことにより滲みの少ない、水に濡れても記録物の汚れに
くい、分散安定性の優れた水性顔料系記録液を提供でき
る。Therefore, according to the present invention, the use of a pigment as a coloring material provides excellent water resistance and weather resistance, the use of an aqueous liquid medium causes less bleeding, the recording material is less likely to become dirty even when wet with water, and the dispersion stability is improved. An excellent aqueous pigment-based recording liquid can be provided.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 滝沢 真紀 埼玉県所沢市大字下富字武野840番地 シ チズン時計株式会社技術研究所内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Maki Takizawa, 840 Takeno, Shimotomi, Tokorozawa City, Saitama Prefecture
Claims (2)
性顔料系記録液において、前記カーボンブラックが、表
面にビニル基を有するモノマーをグラフト重合させた表
面処理カーボンブラックであることを特徴とした水性顔
料系記録液。1. An aqueous pigment-based recording liquid using carbon black as a pigment, wherein the carbon black is a surface-treated carbon black obtained by graft-polymerizing a monomer having a vinyl group on the surface. Recording liquid.
クリル酸、メタクリル酸メチル、アクリル酸、アクリル
酸メチル、アクリロニトリル、アクリルアミド、酢酸ビ
ニル、Ｎ−ビニルピロリドンのうちのいずれか一種もし
くは二種以上である請求項１記載の水性顔料系記録液。2. The monomer having a vinyl group is one or more of methacrylic acid, methyl methacrylate, acrylic acid, methyl acrylate, acrylonitrile, acrylamide, vinyl acetate, and N-vinylpyrrolidone. The aqueous pigment-based recording liquid according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25106896A JPH1095943A (en) | 1996-09-24 | 1996-09-24 | Aqueous pigment-containing recording liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25106896A JPH1095943A (en) | 1996-09-24 | 1996-09-24 | Aqueous pigment-containing recording liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1095943A true JPH1095943A (en) | 1998-04-14 |
Family
ID=17217156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25106896A Pending JPH1095943A (en) | 1996-09-24 | 1996-09-24 | Aqueous pigment-containing recording liquid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1095943A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002527564A (en) * | 1998-10-13 | 2002-08-27 | キャボット コーポレイション | Polymer-coated carbon products and other pigments and their preparation by aqueous medium polymerization or solvent coating |
| JP2002535430A (en) * | 1999-01-20 | 2002-10-22 | キャボット コーポレイション | Aggregates with attached polymer groups and polymer foam |
| JP2004502856A (en) * | 2000-07-06 | 2004-01-29 | キャボット コーポレイション | Modified pigment product, dispersion thereof, and composition containing the same |
| WO2006001545A1 (en) * | 2004-06-28 | 2006-01-05 | Canon Kabushiki Kaisha | Aqueous ink, inkjet recording method, ink cartridge, recording unit, inkjet recorder, and image forming method |
| JP2006045522A (en) * | 2004-06-28 | 2006-02-16 | Canon Inc | Water base ink, water base ink set, ink cartridge, ink jet recording device, ink jet recording method, and image forming method |
| JP2006045514A (en) * | 2004-06-28 | 2006-02-16 | Canon Inc | Water-based ink, inkjet recording method, ink cartridge, recording unit, inkjet recording device and image-forming method |
| JP2010185090A (en) * | 2010-06-04 | 2010-08-26 | Tokai Carbon Co Ltd | Carbon black pigment for aqueous ink |
| JP2011236434A (en) * | 1998-04-03 | 2011-11-24 | Cabot Corp | Modified pigment having improved dispersing properties |
-
1996
- 1996-09-24 JP JP25106896A patent/JPH1095943A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011236434A (en) * | 1998-04-03 | 2011-11-24 | Cabot Corp | Modified pigment having improved dispersing properties |
| JP2002527564A (en) * | 1998-10-13 | 2002-08-27 | キャボット コーポレイション | Polymer-coated carbon products and other pigments and their preparation by aqueous medium polymerization or solvent coating |
| JP2015110785A (en) * | 1998-10-13 | 2015-06-18 | キャボット コーポレイションＣａｂｏｔ Ｃｏｒｐｏｒａｔｉｏｎ | Polymer coated carbon products and other pigments and methods of making the same by aqueous media polymerization methods or solvent coating methods |
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